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- W2144264788 abstract "Congenital or acquired abnormalities may lead to a urethral defect that often requires surgical reconstruction. The traditional methods often lead to complications, including urethrocutaneous fistulae and strictures. In this study, we proposed to construct a tissue-engineered sheet graft (TESG) using a bone marrow mesenchymal stem cell (BMSC)– and smooth muscle cell (SMC)–seeded bladder acellular matrix (BAM) for urethral reconstruction. Rabbit BMSCs and SMCs were isolated, expanded, and identified in vitro before seeding into BAM as the experimental group, whereas BAM-only was the control group. The graft was used to construct TESG for implantation into the rabbit omentum for 2 weeks before urethral reconstruction. We divided 24 male rabbits into four experimental groups six each, and six other were the control group. Histological analysis was performed at 2 weeks, 4 weeks, 8 weeks, and 16 weeks postoperatively. Retrograde urethrography was performed at 16 weeks postoperatively. All experimental rabbits survived to they were humanly killed. At 8 weeks, there was no difference between the graft and the normal urethra with no severe shrinkage. At 8 and 16 weeks after TESG grafting in vivo, multilayer urothelium covered the graft, neovascularization was visible within the center of TESG, and organized smooth muscle bundles were present. Retrograde urethrography failed to demonstrate diverticula formation or urethral stricture. Three control rabbits died within 4 weeks postoperatively. Autopsy showed their urethras to be almost completely blocked whereas another three hosts displays urethral strictures. A TESG was constructed using a BMSC- and SMC-seeded BAM for urethral reconstruction." @default.
- W2144264788 created "2016-06-24" @default.
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- W2144264788 date "2013-11-01" @default.
- W2144264788 modified "2023-09-27" @default.
- W2144264788 title "Urethral Reconstruction Using Bone Marrow Mesenchymal Stem Cell– and Smooth Muscle Cell–Seeded Bladder Acellular Matrix" @default.
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- W2144264788 doi "https://doi.org/10.1016/j.transproceed.2013.07.055" @default.
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