Tissue-engineered autologous peritoneal grafts for bladder reconstruction in a porcine model

Author:

Chen Biao12,Chen Xia3,Wang Wenjia2,Shen Jun4,Song Zhiqiang2,Ji Haoyu12,Zhang Fangyuan12,Wu Jianchen2,Na Jie3ORCID,Li Shengwen12

Affiliation:

1. School of Clinical Medicine, Tsinghua University, Beijing, China

2. Department of Urology, The First Hospital of Tsinghua University, Beijing, China

3. Center for Stem Cell Biology and Regenerative Medicine, School of Medicine, Tsinghua University, Beijing, China

4. Department of Urology, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, China

Abstract

Ileal neobladder construction is a common treatment for patients with bladder cancer after radical cystectomy. However, metabolic disorders caused by transposed bowel segments occur frequently. Bladder tissue engineering is a promising alternative approach. Although numerous studies have reported bladder reconstruction using acellular and cellular scaffolds, there are also disadvantages associated with these methods, such as immunogenicity of synthetic grafts and incompatible mechanical properties of the biomaterials. Here, we engineered an autologous peritoneal graft consisting of a peritoneal sheet and the seromuscular layer from the ileum. Three months after the surgery, compared with the neobladder made from the ileum, the reconstructed neobladder using our new method showed normal function and better gross morphological characteristics. Moreover, histopathological and transcriptomic analysis revealed urothelium-like cells expressing urothelial biomarkers appeared in the neobladder, while no such changes were observed in the control group. Overall, our study provides a new strategy for bladder tissue engineering and informs a variety of future research prospects.

Funder

national key research and development program of china

Chow Tai Fook Medical Research Special Fund

Publisher

SAGE Publications

Subject

Biomedical Engineering,Biomaterials,Medicine (miscellaneous)

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