Chinese Journal of Tissue Engineering Research ›› 2016, Vol. 20 ›› Issue (21): 3088-3096.doi: 10.3969/j.issn.2095-4344.2016.21.007

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Constructing tissue-engineered bladder by vascular endothelial growth factor nanoparticle-bacterial cellulose composite scaffold with various kinds of cells

Zhang Xin-ru, Lu Wen-long, Feng Chao, Lv Xiang-guo, Zhu Wei-dong   

  1. Department of Urology, Shanghai Sixth People’s Hospital of Shanghai Jiao Tong University, Shanghai 200233, China
  • Received:2016-03-29 Online:2016-05-20 Published:2016-05-20
  • About author:Zhang Xin-ru, M.D., Associate chief physician, Department of Urology, Shanghai Sixth People’s Hospital of Shanghai Jiao Tong University, Shanghai 200233, China

Abstract:

BACKGROUND: Traditional bladder repair methods have many problems such as damage to normal organ function and many postoperative complications. Tissue engineering technology provides a new way for bladder repair.

OBJECTIVE: To explore the feasibility of constructing tissue-engineered bladder with vascular endothelial growth factor (VEGF) nanoparticle-bacterial cellulose (BC) composite scaffold with rabbit lingual epithelial cells and tongue muscle cells.
METHODS: Rabbit lingual epithelial cells and muscle cells were successively implanted onto the BC scaffold (control group) and VEGF-BC scaffold (experimental group). Six rabbits were taken to make bladder defect models and randomized into two groups: experimental group implanted with VEGF-BC scaffold carrying autologous lingual epithelial cells and tongue muscle cells, and control group implanted with BC scaffold carrying autologous lingual epithelial cells and tongue muscle cells. Specimens were taken from the two groups for urographic evaluation and histological examination at 3 months after implantation. Meanwhile, the urodynamic tests were performed.

RESULTS AND CONCLUSION: The experimental group showed the relatively complete bladder, and the control group showed a small-area filling defect of the bladder. The maximum bladder capacity and bladder compliance in both two groups were decreased after implantation, especially significantly in the control group (P < 0.05). In the control group, it failed to build a complete epithelial cell layer, and the muscle layer and microvessels were formed a little. In the experimental group, the complete epithelial cell layer was formed, and a larger amount of muscle layers and capillaries appeared. These findings indicate that the VEGF-BC scaffold carrying lingual epithelial cells and tongue muscle cells can be used to construct the tissue-engineered bladder.

 

Key words: Cellulose, Urinary Bladder, Epithelial Cells, Muscle Cells, Tissue Engineering

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