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Construction of Tissue-Engineered Bladder Scaffolds with Composite Biomaterials
Wenjiao Li1, Na Qi1, Tingting Guo1
1Department of Medical Genetics, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China.
Polymers
|July 9, 2022
Summary
This study developed a novel surgical patch using adipose-derived stem cells (ADSCs) and biomaterials to regenerate damaged bladder tissue. The patch successfully promoted bladder reconstruction in rats, showing potential for clinical applications in urinary system repair.
Area of Science:
- Regenerative Medicine
- Biomaterials Science
- Urology
Background:
- Urinary system abnormalities can lead to significant bladder damage.
- Current treatments for bladder structural damage have limitations.
- Tissue engineering offers a promising approach for bladder reconstruction.
Purpose of the Study:
- To construct and evaluate a novel surgical patch for bladder tissue regeneration.
- To assess the efficacy of adipose-derived stem cells (ADSCs) within a composite biomaterial patch.
- To investigate the potential of the patch in repairing significant bladder defects.
Main Methods:
- A surgical patch was created using bladder acellular matrix (BAM), collagen type I, polylactic-co-glycolic acid (PLGA)-chitosan (CS), PLGA-sodium alginate (SA), and growth factors.
- Adipose-derived stem cells (ADSCs) were seeded onto the optimized PLGA-CS/PLGA-SA patch.
- Rat models underwent partial bladder excision (50%) followed by surgical patch implantation and subsequent histological, immunohistochemical, and urodynamic analyses.
Main Results:
- The composite biomaterial patch demonstrated no cytotoxicity to ADSCs.
- The PLGA-CS/PLGA-SA patch (5:5 ratio) exhibited a suitable microporous structure for cell seeding.
- In vivo studies showed successful regeneration of urothelium, muscle bundles, and vasculature, replacing 50% of the native bladder.
- Qualitative and quantitative evaluations confirmed the patch's potential for bladder tissue repair.
Conclusions:
- The novel ADSC-encapsulated surgical patch is a viable candidate for bladder tissue regeneration.
- This composite biomaterial approach shows significant promise for repairing structural bladder damage.
- Further research may lead to advanced treatments for patients with urinary system abnormalities.
